From: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Date: Mon, 30 Apr 2007 07:46:30 +0000 (-0700)
Subject: [IPV4] SNMP: Support InTruncatedPkts
X-Git-Tag: v2.6.22-rc1~1107^2~2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=704aed53b4e43bebfbd425cf95b66794a9cfa2c2;p=~emulex%2Finfiniband.git

[IPV4] SNMP: Support InTruncatedPkts

An IP datagram which is being discarded because the datagram frame
didn't carry enough data should be counted as InTruncatedPkts.

Signed-off-by: Mitsuru Chinen <mitch@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 63ab5230c61..c8c455dd9ca 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -416,7 +416,10 @@ int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
 		goto inhdr_error;
 
 	len = ntohs(iph->tot_len);
-	if (skb->len < len || len < (iph->ihl*4))
+	if (skb->len < len) {
+		IP_INC_STATS_BH(IPSTATS_MIB_INTRUNCATEDPKTS);
+		goto drop;
+	} else if (len < (iph->ihl*4))
 		goto inhdr_error;
 
 	/* Our transport medium may have padded the buffer out. Now we know it